warnings and erros in matlab

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Tomas Iesmantas 2011-7-18

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https://ww2.mathworks.cn/matlabcentral/answers/11797-warnings-and-erros-in-matlab

Hi, Is there any way to write all warnings and errors ocurred in simulation\calculation to some text file?

I generate simulink model automatically and the simulating it through COM. I need to have all errors and warnings occured during simulation in one file.

Thanks in advance,

Tomas

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Answer 1

Jan 2011-7-18

1
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https://ww2.mathworks.cn/matlabcentral/answers/11797-warnings-and-erros-in-matlab#answer_16121

在 MATLAB Online 中打开

I use a dedicated function for logging warnings and errors: The functions is used instead of WARNING and ERROR and writes all messages in a file, which is opened once at the beginning. Unexpected errors have to be caught by TRY/CATCH then.

function myLog(Command, Caller, Msg)
persistent FID
switch Command
  case 'open'
    FID = fopen(Caller, 'w');
  case 'close'
    fclose(FID);
    FID = -1;
  case 'warning'
    fprintf(FID, 'warning: %s: ', Caller);
    if iscellstr(Msg)
      Msg = sprintf(FID, '%s\n', Msg{:});
      Msg(end) = [];
    end
    fprintf(FID, '%s\n', Msg);
    % Perhapse: warning([Caller, ': ', Msg])
    % or: fprintf(2, '%s\n', Msg);
  case 'error'
    fprintf(FID, 'error: %s: ', Caller);
    if iscellstr(Msg)
      Msg = sprintf('%s\n', Msg{:});
      Msg(end) = [];   % Remove trailing line break
    end
    fprintf(FID, '%s\n', Msg);
    % Perhaps: error([Caller, ': ', Msg])
    % or: fprintf(2, '%s\n', Msg);
end

Now this creates the messages:

myLog('open', fullfile(tempdir, 'logfile.txt'));
myLog('warning', 'Project 1', 'totally nonsense');
myLog('error', 'Project 1', {'Completely', 'wrong'});
myLog('close');